adding attributes to an association between two classes

["J. Gonzalez" <boiteauxlettres gmail com>]

hi,

i try to figure out for days how to add attributes to an association
between two classes with dia uml as it is shown at
http://www.gnome.org/projects/dia/umltut/index.html

i googled everywhere i could and i've found nothing.

thank you,

jgonzalez